Reviewers largely see GitHub Copilot as a strong, low-friction coding assistant that saves time on boilerplate, autocomplete, repetitive logic, and learning unfamiliar languages or frameworks without leaving the editor. Several say it has improved noticeably and works well in mature codebases or routine API work. The main caveat is reliability: suggestions can be generic, buggy, or confidently wrong, especially on project-specific patterns or bigger tasks. A few founders also use it heavily for context optimization, low-latency infra work, and CLI or Vim-based workflows.